Home / 307,815.20-461,722.80-285,005.60

Finding the Fourth Proportional to 307,815.20, 461,722.80 and 285,005.60

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Solution

The fourth proportional to 307,815.20, 461,722.80 and 285,005.60 is: 427,508.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,815.20 : 461,722.80 = 285,005.60 : x
  2. Step 2: Convert to fraction form
    307,815.20/461,722.80 = 285,005.60/x
  3. Step 3: Cross multiply
    307,815.20x = 461,722.80 × 285,005.60
  4. Step 4: Simplify right side
    307,815.20x = 131,593,583,647.68
  5. Step 5: Solve for x
    x = 131,593,583,647.68/307,815.20
  6. Step 6: Final answer
    x = 427,508.40

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.